Richard Blimmel / Mbed 2 deprecated CIG_HTTPClient

HTTPClient using static IP

Dependencies:   mbed

NetServices/if/lwip/lwipNetDnsRequest.cpp@0:d8f2f7d5f31b, 2011-05-30 (annotated)

Committer:
mr_q
Date:
Mon May 30 11:53:37 2011 +0000
Revision:
0:d8f2f7d5f31b
v0.01 Draft

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mr_q 0:d8f2f7d5f31b 1
mr_q 0:d8f2f7d5f31b 2 /*
mr_q 0:d8f2f7d5f31b 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
mr_q 0:d8f2f7d5f31b 4
mr_q 0:d8f2f7d5f31b 5 Permission is hereby granted, free of charge, to any person obtaining a copy
mr_q 0:d8f2f7d5f31b 6 of this software and associated documentation files (the "Software"), to deal
mr_q 0:d8f2f7d5f31b 7 in the Software without restriction, including without limitation the rights
mr_q 0:d8f2f7d5f31b 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
mr_q 0:d8f2f7d5f31b 9 copies of the Software, and to permit persons to whom the Software is
mr_q 0:d8f2f7d5f31b 10 furnished to do so, subject to the following conditions:
mr_q 0:d8f2f7d5f31b 11
mr_q 0:d8f2f7d5f31b 12 The above copyright notice and this permission notice shall be included in
mr_q 0:d8f2f7d5f31b 13 all copies or substantial portions of the Software.
mr_q 0:d8f2f7d5f31b 14
mr_q 0:d8f2f7d5f31b 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mr_q 0:d8f2f7d5f31b 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mr_q 0:d8f2f7d5f31b 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mr_q 0:d8f2f7d5f31b 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mr_q 0:d8f2f7d5f31b 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mr_q 0:d8f2f7d5f31b 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
mr_q 0:d8f2f7d5f31b 21 THE SOFTWARE.
mr_q 0:d8f2f7d5f31b 22 */
mr_q 0:d8f2f7d5f31b 23
mr_q 0:d8f2f7d5f31b 24 #include "lwipNetDnsRequest.h"
mr_q 0:d8f2f7d5f31b 25 #include "lwip/err.h" //err_t, ERR_xxx
mr_q 0:d8f2f7d5f31b 26 #include "lwip/dns.h"
mr_q 0:d8f2f7d5f31b 27
mr_q 0:d8f2f7d5f31b 28 #include "netCfg.h"
mr_q 0:d8f2f7d5f31b 29 #if NET_LWIP_STACK
mr_q 0:d8f2f7d5f31b 30
mr_q 0:d8f2f7d5f31b 31 //#define __DEBUG
mr_q 0:d8f2f7d5f31b 32 #include "dbg/dbg.h"
mr_q 0:d8f2f7d5f31b 33
mr_q 0:d8f2f7d5f31b 34 LwipNetDnsRequest::LwipNetDnsRequest(const char* hostname) : NetDnsRequest(hostname), m_state(LWIPNETDNS_START), m_cbFired(false), m_closing(false)
mr_q 0:d8f2f7d5f31b 35 {
mr_q 0:d8f2f7d5f31b 36 DBG("New LwipNetDnsRequest %p\n", this);
mr_q 0:d8f2f7d5f31b 37 }
mr_q 0:d8f2f7d5f31b 38
mr_q 0:d8f2f7d5f31b 39 LwipNetDnsRequest::LwipNetDnsRequest(Host* pHost) : NetDnsRequest(pHost), m_state(LWIPNETDNS_START), m_cbFired(false), m_closing(false)
mr_q 0:d8f2f7d5f31b 40 {
mr_q 0:d8f2f7d5f31b 41 DBG("New LwipNetDnsRequest %p\n", this);
mr_q 0:d8f2f7d5f31b 42 }
mr_q 0:d8f2f7d5f31b 43
mr_q 0:d8f2f7d5f31b 44 LwipNetDnsRequest::~LwipNetDnsRequest()
mr_q 0:d8f2f7d5f31b 45 {
mr_q 0:d8f2f7d5f31b 46 DBG("LwipNetDnsRequest %p destroyed\n", this);
mr_q 0:d8f2f7d5f31b 47 }
mr_q 0:d8f2f7d5f31b 48
mr_q 0:d8f2f7d5f31b 49 /*
mr_q 0:d8f2f7d5f31b 50 Main useful function here (see lwip/dns.h):
mr_q 0:d8f2f7d5f31b 51 err_t dns_gethostbyname(const char *hostname, ip_addr_t *addr,
mr_q 0:d8f2f7d5f31b 52 dns_found_callback found, void *callback_arg);
mr_q 0:d8f2f7d5f31b 53 */
mr_q 0:d8f2f7d5f31b 54
mr_q 0:d8f2f7d5f31b 55 //Execute request & return OK if found, NOTFOUND or ERROR on error, or PROCESSING if the request has not completed yet
mr_q 0:d8f2f7d5f31b 56 void LwipNetDnsRequest::poll()
mr_q 0:d8f2f7d5f31b 57 {
mr_q 0:d8f2f7d5f31b 58 err_t err;
mr_q 0:d8f2f7d5f31b 59 switch(m_state)
mr_q 0:d8f2f7d5f31b 60 {
mr_q 0:d8f2f7d5f31b 61 case LWIPNETDNS_START: //First req, let's call dns_gethostbyname
mr_q 0:d8f2f7d5f31b 62 ip_addr_t ipStruct;
mr_q 0:d8f2f7d5f31b 63 err = dns_gethostbyname(m_hostname, &ipStruct, LwipNetDnsRequest::sFoundCb, (void*) this );
mr_q 0:d8f2f7d5f31b 64 if( err == ERR_OK )
mr_q 0:d8f2f7d5f31b 65 {
mr_q 0:d8f2f7d5f31b 66 m_ip = IpAddr(&ipStruct);
mr_q 0:d8f2f7d5f31b 67 m_state = LWIPNETDNS_OK;
mr_q 0:d8f2f7d5f31b 68 DBG("DNS: Ip found in cache.\n");
mr_q 0:d8f2f7d5f31b 69 }
mr_q 0:d8f2f7d5f31b 70 else if( err == ERR_INPROGRESS)
mr_q 0:d8f2f7d5f31b 71 {
mr_q 0:d8f2f7d5f31b 72 DBG("DNS: Processing.\n");
mr_q 0:d8f2f7d5f31b 73 m_state = LWIPNETDNS_PROCESSING;
mr_q 0:d8f2f7d5f31b 74 }
mr_q 0:d8f2f7d5f31b 75 else //Likely ERR_VAL
mr_q 0:d8f2f7d5f31b 76 {
mr_q 0:d8f2f7d5f31b 77 DBG("DNS: Error on init.\n");
mr_q 0:d8f2f7d5f31b 78 m_state = LWIPNETDNS_ERROR;
mr_q 0:d8f2f7d5f31b 79 }
mr_q 0:d8f2f7d5f31b 80 break;
mr_q 0:d8f2f7d5f31b 81 case LWIPNETDNS_PROCESSING:
mr_q 0:d8f2f7d5f31b 82 break; //Nothing to do, DNS is polled on interrupt
mr_q 0:d8f2f7d5f31b 83 case LWIPNETDNS_OK:
mr_q 0:d8f2f7d5f31b 84 if(!m_cbFired)
mr_q 0:d8f2f7d5f31b 85 {
mr_q 0:d8f2f7d5f31b 86 DBG("DNS: Ip found.\n");
mr_q 0:d8f2f7d5f31b 87 m_cbFired = true;
mr_q 0:d8f2f7d5f31b 88 onReply(NETDNS_FOUND); //Raise callback
mr_q 0:d8f2f7d5f31b 89 }
mr_q 0:d8f2f7d5f31b 90 break;
mr_q 0:d8f2f7d5f31b 91 case LWIPNETDNS_NOTFOUND:
mr_q 0:d8f2f7d5f31b 92 if(!m_cbFired)
mr_q 0:d8f2f7d5f31b 93 {
mr_q 0:d8f2f7d5f31b 94 DBG("DNS: could not be resolved.\n");
mr_q 0:d8f2f7d5f31b 95 m_cbFired = true;
mr_q 0:d8f2f7d5f31b 96 onReply(NETDNS_NOTFOUND); //Raise callback
mr_q 0:d8f2f7d5f31b 97 }
mr_q 0:d8f2f7d5f31b 98 break;
mr_q 0:d8f2f7d5f31b 99 case LWIPNETDNS_ERROR:
mr_q 0:d8f2f7d5f31b 100 default:
mr_q 0:d8f2f7d5f31b 101 if(!m_cbFired)
mr_q 0:d8f2f7d5f31b 102 {
mr_q 0:d8f2f7d5f31b 103 DBG("DNS: Error.\n");
mr_q 0:d8f2f7d5f31b 104 m_cbFired = true;
mr_q 0:d8f2f7d5f31b 105 onReply(NETDNS_ERROR); //Raise callback
mr_q 0:d8f2f7d5f31b 106 }
mr_q 0:d8f2f7d5f31b 107 break;
mr_q 0:d8f2f7d5f31b 108 }
mr_q 0:d8f2f7d5f31b 109 if(m_closing && (m_state!=LWIPNETDNS_PROCESSING)) //Check wether the closure has been reqd
mr_q 0:d8f2f7d5f31b 110 {
mr_q 0:d8f2f7d5f31b 111 DBG("LwipNetDnsRequest: Closing in poll()\n");
mr_q 0:d8f2f7d5f31b 112 NetDnsRequest::close();
mr_q 0:d8f2f7d5f31b 113 }
mr_q 0:d8f2f7d5f31b 114 }
mr_q 0:d8f2f7d5f31b 115
mr_q 0:d8f2f7d5f31b 116 void LwipNetDnsRequest::close()
mr_q 0:d8f2f7d5f31b 117 {
mr_q 0:d8f2f7d5f31b 118 DBG("LwipNetDnsRequest: Close req\n");
mr_q 0:d8f2f7d5f31b 119 if(m_state!=LWIPNETDNS_PROCESSING)
mr_q 0:d8f2f7d5f31b 120 {
mr_q 0:d8f2f7d5f31b 121 DBG("LwipNetDnsRequest: Closing in close()\n");
mr_q 0:d8f2f7d5f31b 122 NetDnsRequest::close();
mr_q 0:d8f2f7d5f31b 123 }
mr_q 0:d8f2f7d5f31b 124 else //Cannot close rightaway, waiting for callback from underlying layer
mr_q 0:d8f2f7d5f31b 125 {
mr_q 0:d8f2f7d5f31b 126 m_closing = true;
mr_q 0:d8f2f7d5f31b 127 }
mr_q 0:d8f2f7d5f31b 128 }
mr_q 0:d8f2f7d5f31b 129
mr_q 0:d8f2f7d5f31b 130 void LwipNetDnsRequest::foundCb(const char *name, ip_addr_t *ipaddr)
mr_q 0:d8f2f7d5f31b 131 {
mr_q 0:d8f2f7d5f31b 132 if( ipaddr == NULL )
mr_q 0:d8f2f7d5f31b 133 {
mr_q 0:d8f2f7d5f31b 134 DBG("LwipNetDnsRequest: Callback: Name not found\n");
mr_q 0:d8f2f7d5f31b 135 m_state = LWIPNETDNS_NOTFOUND;
mr_q 0:d8f2f7d5f31b 136 return;
mr_q 0:d8f2f7d5f31b 137 }
mr_q 0:d8f2f7d5f31b 138 DBG("LwipNetDnsRequest: Callback: Resolved\n");
mr_q 0:d8f2f7d5f31b 139 m_ip = IpAddr(ipaddr);
mr_q 0:d8f2f7d5f31b 140 m_state = LWIPNETDNS_OK;
mr_q 0:d8f2f7d5f31b 141 }
mr_q 0:d8f2f7d5f31b 142
mr_q 0:d8f2f7d5f31b 143
mr_q 0:d8f2f7d5f31b 144 void LwipNetDnsRequest::sFoundCb(const char *name, ip_addr_t *ipaddr, void *arg)
mr_q 0:d8f2f7d5f31b 145 {
mr_q 0:d8f2f7d5f31b 146 DBG("LwipNetDnsRequest: Static callback\n");
mr_q 0:d8f2f7d5f31b 147 LwipNetDnsRequest* pMe = (LwipNetDnsRequest*) arg;
mr_q 0:d8f2f7d5f31b 148 return pMe->foundCb( name, ipaddr );
mr_q 0:d8f2f7d5f31b 149 }
mr_q 0:d8f2f7d5f31b 150
mr_q 0:d8f2f7d5f31b 151 #endif
mr_q 0:d8f2f7d5f31b 152